A handout picture made available by SpaceX shows a Falcon 9 rocket landing upright at Cape Canaveral Air Force Station in Florida. SpaceX successfully returned a rocket to Earth following Monday's satellite launch after two earlier attempts failed. SpaceX/EPA/Landov hide caption

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The SpaceX Falcon 9 rocket and Dragon spacecraft break apart shortly after liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Fla., on June 28. SpaceX CEO Elon Musk said Monday the failure of a steel strut likely caused the rocket to explode. John Raoux/AP hide caption

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On Friday, a Russian Soyuz rocket will send an unmanned cargo ship with more than 3 tons of food, water and fuel for astronauts aboard the International Space Station. Russian Federal Space Agency hide caption

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Russian Rocket Poised For Crucial Supply Run To Space Station

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